Three U.S. scientists are concern about the potential of people contracting Creutzfeldt Jakob disease -- the human form of "mad cow disease" -- from eating farmed fish who are fed byproducts rendered from cows.

Two Die In Spain From Human Form Of Mad Cow Disease SPAIN: April 8, 2008 MADRID - Two people have died in Spain from variant Creutzfeldt-Jakob Disease, the human form of mad cow disease, the health department of the regional Castilla-Leon government said on Monday. The Carlos III Institute, which specialises in epidemics, said it had logged three deaths from vCJD since 2005, including those announced in Castilla-Leon. A health department spokesman from the northern region said one person had died of vCJD 15 to 20 days ago, and one in late December or early January.